Educational appliance.



No. 672,062. Patented A r I6 I90! H. HANS'I'EIN. p EDUCATIONALAPPLIANCE. (Application filed Mar. 2. 1898.)

("0 Model.)

2 Sheets-Sheet l.

No; 672,062. Patented Apr. 16, l90l. H. HANSTEIN. EDUCATIONAL APPLIANCE.(Modem (Application flied my. 2, was.)

2 Sheets-Sheet 2,

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HERMANN HANSTEIN, OF CHICAGO, ILLINOIS.

EDUCATIONAL APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 672,062, dated April16, 1901.

Application filed March 2, 1898.

To all whom it may concern:

Be it known that I, HERMANN HANSTEIN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Educational Appliances,of which the following is aspecification.

My invention relates to educational appliances, and'has for its objectto provide a new and useful appliance for this purpose.

My invention is illustrated in the accompanying drawings, wherein Figure1 is a view of one form of the device or appliance embodying myinvention. Fig. 2 is an enlarged view of the device shown in Fig. 1 withthe object omitted. Fig. 3 is a plan view of Fig. 2. Fig. 4 is a viewshowing modified construction.

Like letters refer to like the several figures.

In teaching drawing, for example, relating to bodies having threedimensions or in the study of solid geometry, projections, or other likestudies dealing with figures having three dimensions it is verydifficult, indeed, to give a correct idea to the pupil of the variousbodies and figures under discussion by representing them upon a planesurface.

The object of my invention is to provide the instructor with means ofrepresenting such bodies accurately to the students, so that they may beprovided with an accuratevisual representation of the thing underdiscussion, thus enabling them afterward to properly reproduce it by theaid of their imagination.

In carrying out my invention I provide a device to which theobject undercontemplation may be attached. The device is so constructed as to allowthe position of the object to be varied in order thatit may be presentedto the sight in any desired position and be held in any of its variouspositions when desired, so as to be continuously under inspection whilein this position. Referring now to the drawings, wherein I have shown adevice for this purpose, I provide an engaging or holding device A.0fany suitable description and adapted to engage the object to bepresented. As herein illustrated, I have shown the engaging device asadapted to be used in connection with skeleton models or figures, suchengaging device consisting of the part A, provided with an opening inwhich is parts throughout Serial No. 672,264. (No model.)

inserted the arm or projection A on the corner-piece A of the skeletonmodel. The part A is provided with the thumb-screw A by means of whichthe projection A may be tightly gripped. This holding or engaging part Ais rotatably mounted in a suitable bearing A the bearing being providedwith the tightening device or thumb-screw A by which the part A may betightly gripped, so as to be held ina given position. Connected with theholding part A is a graduated are or disk A the fixed pointer A beingassociated therewith, so that the holding device may be rotated aboutits axis and fixed in any given position by setting the pointer oppositesome particular graduation on the scale. The bearing A in which theholding part A is mounted, is itself provided with a projecting partmounted in a bearing B at the upper end of the arm B. Attached to thisprojecting part, and hence to the bear ing A, is a graduated circle ordisk E the part so arranged that the axis of the holding device A may bemoved to any given position in the plane in which it is located. Thebearing B is provided with means for gripping the projecting part ofbearing A so that the holding device may be held in any of its variouspositions. I have shown this bearing as being split, the parts providedwith a thumb-screw B so that they may be moved with relation toeachother, thus gripping or releasing the parts mounted therein..

The arm B is connected with a shaft 0, mounted in a bearing C, saidshaft being provided with a graduated disk 0 said disk being providedwith the stationary pointer 0 past which the graduations move. Asuitable pointer may be provided for the graduated disk B or I may useone of the graduations on disk C as the indicating device by means ofwhich the graduations are read. The bearing 0 is also provided withmeans for clamping and releasing shaft O-as, for example, thethumb-screw O Said bearing is also provided with suitable means ofattaching it to a fixed support. Any suitable means may be used for thispurpose, and I have shown in the drawings the simple clamp 0 by means ofwhich the device may be clamped to the edge 0 of a table orthe like.

I have described in detail a particular construction embodying myinvention; but it is of course evident that the various parts may bechanged in form of construction and arrangement, if desired, without inany manner departing from the spirit of my invention. It is also evidentthat some of the parts may be Omitted and others used with parts notherein shown, if desired. For example, I have shown in Fig. 4 aconstruction in which the holding part A is not rotatable; but it isrigidly fastened to the shaft or part carrying the graduated disk 13".This construction does not allow as many positions of the objectpresented as may be obtained by means of the device shown in Figs. 1 and2.

Referring now to Fig. l, I have shown a skeleton model D, provided withremovable corner-pieces, the corner-piece A being provided with suitableprojections A, which are not used in making up the model, butwhichproject beyond the figure and which can be attached in various positionsto the holding part A. When it is desired to present the figure invarious positions to the students, one of the projecting parts A isinserted in the opening in the engaging part A and the thumb-screw Atightened. Said engaging part A may then be rotated about its axis, thusallowing the figure to he completely rotated. By loosening thethumb-screw B the axis of the engaging part A may be shifted to anyposition desired, the figure being held in this position when thethumb-screw is tightened. When the figure is in an inclined position, asshown, for example, in the dotted lines in Fig. 1, due to the movementofthe holding device A to an inclined position, said figure may then berotated about the axis of the engaging device, as heretofore described.A further movement of the object may be obtained by unclamping thethumbscrew 0 and rotating shaft C. It will thus be seen that I have herethree axes of rotation which are independent of each other, thusallowing the object presented to be moved to any desired position inspace, the graduated disks or arcs associated with these three axesindicating the exact position in space occupied by the object andallowing it to be moved to any predetermined position and held in suchposition while under consideration. It will therefore be seen that bymeans of this device I am enabled to present continuously to the view ofthe student any desired object -in any desired position in space and atthe same time, if desired, make known to them the exact positionoccupied by such object.

I have not endeavored to set forth the various uses of my invention; butit will be readily seen that it may be used in considering for anypurpose surfaces and solids, thus allowing the students to obtain acorrect representation of such surface or solid in any position inspace.

It will be found that this device is exceedingly useful in the study ofdrawing, solid geometry, projection, descriptive geometry, stereotomy,crystallography, and the like.

I claim- 1. An educationalappliance for displaying figures and objectsto students, com prising a clamp adapted to be clamped to a fixedsupport, a firstsupport rotatably mounted on the clamp and carrying abearing and a circular scale, a second support rotatably mounted on thefirst support and having a bearing and a circular scale at right anglesto the first scale, and an object-holder rotatably mounted in thebearing of the second support.

2. An educational appliance for displaying figures and objects tostudents, comprising a clamp adapted to be clamped to a fixed supportand provided with a bearing, a rotatable part mounted in said bearingand having its upper end bent out of-alinement with said bearing, aholding devicefor engaging the article to be displayed, said holdingdevice substantially in the plane of the axis of the clamp-bearing andprovided with an angular piece rotatably mounted on the upper end of thepart connected with the clamp, said holding device rotatably mountedupon said angular part.

3. An educational appliance for displaying figures and objects tostudents, comprising a clamp adapted to be clamped to a fixed supportand provided with a bearing, a rotatable part mounted in said bearingand having its upper end bent out of alinement with said bearing, adetachable holding device for engaging the article to be displayed, saidholding device substantially in the plane of the axis of theclamp-bearing and provided with an angular piece rotatably mounted onthe upper end of the part connected with the clamp, and scales connectedwith said angular part and the rotatable part on the clamp, said scalesgraduated so as to indicate the various positions of said parts.

4. An educational appliance for displaying figures and objects tostudents, comprising a clamp adapted to be clamped to a fixed support, afirst support rotatably mounted on the clamp and carrying a bearing, asecond support rotatably mounted on the first support and having abearing, an object-holder rotatably mounted in the bearing of the secondsupport, and a circular or disk scale associated with each rotatablepart and at right angles one to another.

5. An educational appliance for displaying objects to students,comprising a rotatable part mounted upon a suitable support, a holdingdevice adapted to be connected with the object to be displayed, androtatably mounted upon said rotatable part, so as to be rotated about anaxis at an angle to the axis of rotation of the rotatable part, saidholding device substantially in alinement with the axis of saidrotatable part.

HERMANN HANSTEIN.

Witnesses:

DONALD M. CARTER, HOMER L. KRAFT.

